Alternator not Charging Battery

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    Author Topic: Alternator not Charging Battery  (Read 1798 times)

    nivvy

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    Alternator not Charging Battery
    « on: September 30, 2005 - 02:34:08 PM »
    I Replaced the voltage regulator...and it is a new powermaster 75 amp.....they said the would warranty the alternator but could the alternator not be strong enough because i relocated the battery to the trunk.....


    8 Pack
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    Offline ntstlgl1970

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    Re: Alternator not Charging Battery
    « Reply #1 on: September 30, 2005 - 02:52:39 PM »
    As long as the battery circuit is good (meaning low to no voltage drop on the alternator output to battery positive, and good grounds etc.) it shouldn't make any difference if the battery is in the trunk or not.
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    70 Cuda, 7.0L Gen-III Hemi, Viper T56 w/9310 gearset, 3.91's, Megasquirt MS3x v3.57, Innovate wideband, Firm Feel upper arms, torsion bars, springs and strut rods, QA1 DA shocks. I did everything on this car except the fancy paint stuff and I drive it...and I can't seem to stop messing with it....

    Offline Plum6Pak

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    Re: Alternator not Charging Battery
    « Reply #2 on: September 30, 2005 - 03:35:06 PM »
    Hey 8 Pack, what gauge cable did you run to the battery in the trunk? Did this work okay before you re-located the battery and does it start fine if you charge the battery?
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    nivvy

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    Re: Alternator not Charging Battery
    « Reply #3 on: September 30, 2005 - 08:49:22 PM »
    2 gauge wire....and yea it starts fine then slowly wears down...

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    Offline CloneTommy

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    Re: Alternator not Charging Battery
    « Reply #4 on: September 30, 2005 - 09:10:33 PM »
    How new is the alternator?

    What does the battery read when it's running? Should be 13.5-14.4 volts.

    I had a similar problem with my truck, freeway speeds it was okay, but around the block it would drain out, replaced the alternator and problem solved. The alternator was charging the battery, then draining it right back out. The diodes were shot.

    shot happens.

    -Tommy
    « Last Edit: September 30, 2005 - 09:16:10 PM by CloneTommy »
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    Offline Chryco Psycho

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    Re: Alternator not Charging Battery
    « Reply #5 on: October 01, 2005 - 02:36:31 AM »
    I have seen 4 virtually new Pwermaster alts fail
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    Challenger - You`ll wish You Hadn`t

    nivvy

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    Re: Alternator not Charging Battery
    « Reply #6 on: October 01, 2005 - 09:38:55 AM »
    It is new...ill just send it back....

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    Offline gomangoRT/SE

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    Re: Alternator not Charging Battery
    « Reply #7 on: October 01, 2005 - 09:57:30 AM »
    Dont send the altenator back just yet.    First go to a Autozone or O Reillys and they can check your altenator to see how much its putting out.   
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    Offline Grancoupe

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    Re: Alternator not Charging Battery
    « Reply #8 on: October 01, 2005 - 10:27:42 AM »
    if your not running a cut off switch, why not connect the alternator to the battery at the starter stud. You can cut down on the length of the smaller wire off of the alternator and flow most of the current back up the bigger bat positive.
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    nivvy

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    Re: Alternator not Charging Battery
    « Reply #9 on: October 04, 2005 - 05:50:11 PM »
    I am running a cut off switch......2 guage Battery cable is connected right to alternator....are you talking about running the smaller wire off the starter that normally runs to the relay under the hood run direct to the battery post on the alternator...


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    Offline VPOINTCUDA

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    Re: Alternator not Charging Battery
    « Reply #10 on: October 05, 2005 - 01:27:39 AM »
    I don't know if this is any help or not, , ,  I trunk mounted my battery as well, I'm using an alternator that has been sitting since 1992 , a regulator that is the same, a starter , the same , and have no problems with charging. I would try another voltage regulator or take a voltage reading at the battery first and work my way back to the alternator . Could be a bad battery, or any of the affore mentioned !
    Wish I could be more help !
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    " the question isn't  when is he going to stop, but whose gonna stop him!"

    nivvy

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    Re: Alternator not Charging Battery
    « Reply #11 on: October 05, 2005 - 11:14:53 AM »
    the battery is practically new and the voltage reg is brand new..just got last week...

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    Offline VPOINTCUDA

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    Re: Alternator not Charging Battery
    « Reply #12 on: October 06, 2005 - 12:33:07 AM »
    Hey , I bought a brand new regulator once ( way back in the past ) ( but the past serves us in our present ! ) that was bad ! Check your voltage at the battery with a meter with the motor idleing around 1500 or so, it should be around 14 volts.
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    " the question isn't  when is he going to stop, but whose gonna stop him!"

    Offline Grancoupe

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    Re: Alternator not Charging Battery
    « Reply #13 on: October 06, 2005 - 09:10:07 AM »
    Quote from: 8 PACK on October 04, 2005 - 05:50:11 PM
    I am running a cut off switch......2 guage Battery cable is connected right to alternator....are you talking about running the smaller wire off the starter that normally runs to the relay under the hood run direct to the battery post on the alternator...


    8 Pack

    No. I was talking about the heavy output lead from the battery. You can charge the battery from the alternator back through the heavy battery cable without having to run an output all the way back to the battery. But since you're running a cut off switch you can't run the set up. It would create a loop. If you tried to shut off the car with the switch and the alternator was connected at the starter point, the alternator would take the place of the battery and the car would keep running. I know this for sure. I tried it... It was the first time I had set the battery in the trunk. Always learning.
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    nivvy

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    Re: Alternator not Charging Battery
    « Reply #14 on: October 06, 2005 - 12:46:58 PM »
    when i first hooked the battery in the trunk and hit the cutoff switch the car shut off..... I didnt do anything different to the alternator...


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